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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '095eff0a4333bb5fc07c35a3f463d86381fe5d579a3502bd700526acc3b29a44' 
  AND token = 'lT81uNAEzUen/FCCNn5H6/5hJjgpAiaf0h2C/o6ecOg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}